Projection system and expansion module

1. An expansion module, adapted to a projector, comprising: a housing, a logic circuit, and an output port, wherein the logic circuit is disposed in the housing for controlling an operation of the expansion module, the output port is disposed in the housing and coupled to the logic circuit, the output port is connected to an input port disposed in the housing of the projector, the output port is capable of outputting a first signal to the input port, such that the projector is capable of generating an image and is capable of projecting the image according to the first signal, the output port of the expansion module is fixed to the input port of the projector in a pluggable manner, and a specification of the output port of the expansion module and a specification of the input port of the projector are matched, such that the expansion module and the projector are able to connect with each other in the pluggable manner, wherein the expansion module further comprises a battery, adapted to provide electrical power for the projector via the output port of the expansion module and the input port of the projector.

2. The expansion module according to claim 1 , wherein the output port of the expansion module is selected from the group comprising a video graphics array interface, a digital visual interface, a universal serial bus interface, a digital video broadcasting interface, and a high-definition multimedia interface.

3. The expansion module according to claim 1 , further comprising an input port, adapted to receive a second signal, wherein a specification of the input port of the expansion module is different from the specification of the input port of the projector, and the logic circuit of the expansion module is capable of converting the second signal into the first signal.

4. The expansion module according to claim 3 , wherein the input port of the expansion module is selected from the group comprising a video graphics array interface, a digital visual interface, a universal serial bus interface, a digital video broadcasting interface, and a high-definition multimedia interface.

5. The expansion module according to claim 1 , further comprising a charging circuit, adapted to be connected to an external power supply, for charging the battery.

6. The expansion module according to claim 1 , further comprising a memory card interface, connected to a memory card, wherein the logic circuit is capable of reading the data stored in the memory card via the memory card interface, and the logic circuit is capable of converting the data stored in the memory card into the first signal.

7. The expansion module according to claim 1 , further comprising an operation interface, adapted to be manipulated by a user to change an operation mode of the expansion module.

8. A projection system, comprising: a projector, comprising a housing and an input port, wherein the input port of the projector is disposed in the housing of the projector; and an expansion module, comprising: a housing; a logic circuit, disposed in the housing of the expansion module, for controlling an operation of the expansion module; and an output port, disposed in the housing of the expansion module, coupled to the logic circuit, and connected to the input port of the projector, for outputting a first signal to the input port, such that the projector is capable of generating an image and is capable of projecting the image according to the first signal, wherein the output port of the expansion module is fixed to the input port of the projector in a pluggable manner, and a specification of the output port of the expansion module and a specification of the input port of the projector are matched, such that the expansion module and the projector are able to connect with each other in the pluggable manner, wherein the expansion module further comprises a battery, adapted to provide electrical power for the projector via the output port of the expansion module and the input port of the projector.

9. The projection system according to claim 8 , wherein the output port of the expansion module is selected from the group comprising a video graphics array interface, a digital visual interface, a universal serial bus interface, a digital video broadcasting interface, and a high-definition multimedia interface.

10. The projection system according to claim 9 , wherein the input port of the projector is a video graphics array interface.

11. The projection system according to claim 8 , wherein the expansion module further comprises an input port, adapted to receive a second signal, wherein a specification of the input port of the expansion module is different from the specification of the input port of the projector, and the logic circuit of the expansion module is capable of converting the second signal into the first signal.

12. The projection system according to claim 11 , wherein the input port of the expansion module is selected from the group comprising a video graphics array interface, a digital visual interface, a universal serial bus interface, a digital video broadcasting interface, and a high-definition multimedia interface.

13. The projection system according to claim 8 , wherein the expansion module further comprises a charging circuit, adapted to be connected to an external power supply, for charging the battery.

14. The projection system according to claim 8 , wherein the expansion module further comprises a memory card interface, connected to a memory card, wherein the logic circuit is capable of reading data stored in the memory card via the memory card interface, and the logic circuit is capable of converting the data stored in the memory card into the first signal.

15. The projection system according to claim 8 , wherein the expansion module further comprises an operation interface, adapted to be manipulated by a user to change an operation mode of the expansion module.